Oil-burning furnace.



DAHL. OIL BUBNING FURNACE. APPLICATION FILED JAILZQ, 1913.

Patented July 29, 1913.

2 SHEETS SHEBT 1.

a IVE|NTOR ATTORNEYS I IZNVENTOR 9m Patented July 29, 1913.

2 SHEETS-SHEET 2.

E 8 3 m w w 3 E w m K. M. DAHL. OIL BURNING FURNACE.

APPLICATION FILED JAN. 29 1913.

ATTORNEYS To all may concern:

WORKS 00., 01 SAN FRANCISCO, CALIFORNIA, A COR PORATION OF NEW JERSEY.

orn-nnnnmo FURNACE.

Beit known that I, KNUT MARTIN DAHL, a citizen of the United States, residing in the city and county of'San Francisco, State of California, have invented a new and useful Oil-Burning Furnace, of which the following is a specification.

My Invention cohsists of a novel construction of an '011 burning furnace and its ad-' jimcts, and in its broad aspects relates particularly to the novel construction of an extension front for an oil burning furnace, whereby I am enabled to readily equip a furnace or boiler which may have been initially installed to use coal or similar fuel with my novel extension front for use of oil or other liquid hydrocarbon fuel, which can be readily applied to existing boilers withthe evaporation capacity out diminishing thereof.

My present invention therefore consists of a, novel extension front adapted to be attached to any desired't'ype of furnace but especially adapted for use with oil burning furnaces, operating under either forced or natural draft, and havingnovelmeans for controlling the admission of air and for preventing radiation of heat.

It further consists of a novel construcdoors. 5

It further consists of other novel features a of construction, all as will be hereinafter fully set forth. a

For the purpose of illustrating myinven- .tion, I have shown in the accompanying drawings one form thereof which is at present preferred by me, since the same has been found in practice to 've satisfactory and reliable results, althoug it is to hemderstood that the various instrmnentalities of which my invention consists can be variously'arranged and organized and that my invention is not limited to the precise arran'gement and organization of these instrumentalities as herein shown and de scribed. i y I Figure 1 represents a front elevation of anextension front for oil burning furnaces,

embodying my-invention, certain parts being omitted for the sake of clearness of illustration. Fig. 2 represents a sectional eleva tioiiof Fig. 1.. Fig. 3 represents a sectional The, plate. 22 is apertured to receive g l. 3.8 designates a latch,

Specification of Letters Patent. Patented July 29, 1913. Application filed January 29, 1913. Serial 1! 0. 744,844.

elevation showing another manner of securmg the extension front to the furnacewall proper. Fig. 4 represents a plan view of a bracket.

UNITED STATES T NT omen;

xnn'r ARTIN nn'nn, or san'rmncrsco, onuronnm, nssrenon. 'ro Union IRON usually constructed of-fire brick and pro- I vided with an openin 2 forming a mixing -or commingling chamber.

3 designates the side wall of the extension front which overlaps the front wall 1, as indicated at 4, and connected, if desired,with the furnace casing membersfi-and 6. The side wall 3 is annular, inthe present instance, and constructed of sheet iron, within which is a fire brick lining 7. I

8 designates an angle ironconnected with the plate 3 and also withthe front plate 9, which latter is rovided on its inner face with any desir number of layers of asbestos 10.

11 designates an annular angle iron secured to the late 9 by fastening devices 12,

certain .of w ich latter. also secure a baflle plate 13 in position in the preheating chamber 14, which latter is of larger diameter, in the present instance, than the mixing chamher 2. The bafile plate '13 has its top and bottom portions spaced away from the furnace front 'and the furnace wall .1 respectively, so as to admit ingress of air over its top andbottom edges, and is angularly arranged with respect to a door 16 hinged at 17 to the front plate 9.

I having an operating handle 18; 19 designates a chain having one being adapted to interlock with an aperture 20 in a bracket 21, carried by a plate 22, secured to the front plate. v

- 23 designates a door hinged at 24 and provided with a bracket 25 having a slot 26 therein adapted to receive a chain 7', one end of which is secured to the front plate 9. The door 23 is apertured, as at 28, to form a sight. opening which is normally closed by a pivoted door 29.

end connected with the door 16, said chain thimble 30, within which is longitudinally adjustable, a'slecve 31, open at its outer end to the atmosphere and through which passes the fuel conduit 32 provided with an atomizer 33, preferably centrally located with respect to the mixing chamber 2.

Located within the chamber 14: of the extension front is a hollow cone or similar shaped damper 34 presenting its end of larger diameter to the mixing chamber and longitudinallyadjustable with respect to the atomizer or burner.33, which latter may be of any desired construction- For purposes of illustration, the air damper 34' is shown as carriedby the sleeve 31 and longitudi-J nally adjustable therewith.

, 35 designates a controlling valve for the the burner. The air admission is controlled byithe proper manipulation of the doors 16 and 23. The damper 34.- and burner-33 l are relatively adjustable. and, in the present instance, the burner is shown as stationary andthe damper 34 longitudinally adjustable with 'respect to said burner 33'.

By securing the-annular side wall 3 to the furnace front or the forward end of the I r boiler shell in the manner described, I am enabled to utilize or attach my invention to boilers of any standard type already installed, 'without, unnecessary dismantling of the same and without detracting from the external appearance'thereof, and by lining the extension front with insulatingmaterial at.7 and 10, I prevent the radiation of heat into the boiler room. The bafile plate or deflector 13 is preferably curved or are shaped at its lower edge, as indicated in dotted lines in Fig. 1, and if desired, may be provided at its lower portions, with the feet. 39 to retain the deflector in position, theupper edge 40 I of the deflector terminating a short distance from the asbestos lining v1Q, so that; air is permitted to .fiowover the upperand lower edges of the deflector to the commingling chamber 2. as indicated by the arrows a and b' in Fig. 2, and by opening the door -15 -.the amount of air necessary 'to =proinotecom bustron may regulated as desired and by. the interposltion of the deflector,- =the ingress of the moving air is slightly retarded and the air preheated before reaching the commlngling chamber 2. The oil is con ducted to the atomizer 33- under pressure and is preferably heated, but such prelim-- nary heating may be dispensed with if desired, or it may be dispensed with after the burner is in operation.

While my invention, in its broad aspects, is capableof use with any suitable atomizer, I prefer to employ the atomizer of my prior 1911, and No. 1,008,119, dated November 7th, 1911.

It will be understood by those skilled in this art, that in vessels which are already equipped with furnaces, the amount of space available to install an oil burning'system is limited, and if the furnace front iscut away to accommodate the system, the

evaporation capacity of "the boiler is re duced. By the employment. of my present invention, it is unnecessaryto cut awaythe furnace wall, and it is only necessary to connect therewith and exterior thereof, my novel extension front, .whereby'the area of the combustion chamber isnot decreased in any manner whatsoever. I

Itwill now be apparent that I have devised a novel and useful. construction of an oil burning furnace which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have, in the present instance, shown and described a preferred embodiment thereof-which has beenfound in practice to give satisfactory patents, No. 1,011,036, dated December 5th,

and reliable results, it is to be understood I tion. in various particulars .withoutdeparting from the spirit or scope of'theinvention or sacrificingany' of its advantages,

"that the same is susceptible .of ,modifica- Having thus described-my invention, what I claim as new and desire to secure by Letters Patent, is 1 1. An extension front for an. oil burning furnace, comprisinga side wall, a. non-con-'- ducting lining therefor, a front plate se-- cured to said side wall, a non-conducting lining therefor, a lower doorpivoted to said front plate, and extending across sub'stan tially the entire lower portion of said front plate, and an inclinedbaflie late attached to the, inner portion of said rontplate, and. adapted to permit the ingress of air over its,

upper and lower edgesto the point of coin.- bus'tion. V 4 v 2. -An extensionfront for-an oil burning furnace, comprising a side wall, a non-conducting liningi therefor, Q a": front plate secured to said side" wall,. a non-. conducting lining for said front plate, a lowerdoor pivoted 'tosaid frontplate," and extending across the lower portion'o'f the furnace front,

aninclined' bafile within "Said side .yvall to retardand deflect the. airpassingtd the pomtofcombustion, and means to'adjustthe' position of said door.

.. 3111i an oil burning-furnace, a boilr she'll} {front Wall therein having a comextension front forming a continuation of said boiler shell, non-conducting lining therefor, a frontplate for said extension front and spaced from said Wall to form a preheating chamber, a lower door pivoted to said front plate, and an inclined baflle plate in the lower portion of said preheating chamber and adapted to permit the ingress of air over its edge to said eommingling chamber.

.4. The combination of a furnace wall having an opening therethrough forming a mixing chamber, a detachable extension front secured upon said wall and having an upper and a lower controllable air opening, an oil burner discharging into' said mixing chamber, a hollow cone shape damper presenting its face of greater diameter toward said wall, means to longitudinally adjust said damper, and a battle plate intermediate said lower opening and said burner.

5. The combination of a furnace wall having an opening therethrough forming a mixing chamber, an extension front secured to said wall and having a controllable air opening, a hydrocarbon burner dlscharging into said mixing chamber, a hollow cone shape damper presenting its face of greater diameter toward said wall, a baffle plate intermediate of said damper and said control-. able air opening, and means to longitudinally. adjust said damper.

'6. The combination of a furnace wall having an opening therethrough forming a mixing chamber, an extension front secured to said wall and having a controllable air opening, and comprising an outer metal casing lined with heat resistant material, a

liquid hydrocarbonburner discharging into said mixlng chamber, a hollow cone shape damper presenting its face of greater diam- 'eter toward said wall, means to longitudinally adjustsaid damper, and a baflle plate intermediate said opening and damper.

7. The combination of a furnace wall having an opening therethrough forming a mixing chamber, an extension front comprising an annular metal casing secured to said wall and lined with fire brick, a front wall lined with asbestos and having a controllable air opening, a bafile plate in the lower portion of said extension front, a sleeve adjustable throughsaid front wall, a liquid hydrocarbon burner within said sleeve and discharging into said mixing chamber, a cone shaped and damper between said front wall and said burner, and means exterior of said extension front to longitudinally adjust said damper with respect to said burner.

8. The combination of a furnace wall having an opening therethrough forming a mixing chamber, an extension front forming a preheating chamber exterior of said wall comprising an annular metal casin secured to said wall and lined with fire brick, and a front wall lined with asbestos and having a plurality of controllable air openlngs, means in said preheating -cham-' her to retard and deflect the air passing from one of said openings to said mixing chamber, front wall, a burner within said sleeve and discharging into said mixing chamber, an apertured damperbetween said front Wall 'asleeve adjustable through saidv and said burner, and means exterior of said extension front to longitudinally adjust said damper with respect to said burner.

9. An extension front for an oil burning furnace, comprising a side wall secured to the furnace front, a non-conducting lining a. controllable peep hole, means to secure said first door in its adjusted position, means to secure said second door in its adjusted position, an inner flanged plate secured to said front plate and surrounding the aperture of said apertured plate and said upper door,

and a baffle secured to said apertured plate Q and of less dimensions than said lower door and angularly inclined with respect thei eto.

10.'The combination of a furnace wall having an opening therethrough forming a mixing chamberfan extension front secured to said wall and-having a controllable air opening, a hydrocarbon burner discharging into said mixing chamber, a hollow'cone shaped damper supported substantially 'con centrically of said burner, means for lon gitudina-lly adjusting said damper, and a baflie plate intermediate of said damper and controllable air opening.-

KNUT MARTIN DAHL.

\Vitnesses v FREDERICK BIRDSALL MAURICE AsHnR. 

